Amorphous fluorine-containing resin composition and a manufacturing method of thin films

ABSTRACT

[Object of this Invention] To provide the amorphous fluorine-containing resin composition that has superior film-forming ability, and has a small impact on the global environment due to its very small global warming potential, and can fully satisfy the requirement from the perspective of the environmental protection of the earth; and to provide the article that contains the coating that is formed from the thin films that are made from this amorphous fluorine-containing resin. composition.

TECHNICAL FIELD

This invention is related to an amorphous fluorine-containing resincomposition that dissolves the amorphous fluorine-containing resin in afluorinated solvent, and is related to a manufacturing method of thinfilms.

TECHNOLOGY BACKGROUND OF THE INVENTION

Among other fluorine resins, because the perfluoro polymer that isparticularly represented by the copolymer (PFA) of tetrafluoroethylene(TFE) and perfluoro (alkyl vinyl ether) and (PAVE) has thecharacteristics of superior heat resistance, chemical resistance,purity, dielectric constant and so on, this polymer is used formelt-molding of piping for transporting various chemicals, joints ofpiping, transportation containers, storage containers, pumps and filterhousings, and so on in chemical plants and semiconductors or themanufacturing process of the liquid products; and is used for liningelectronic boards, steel pipes, pulps, fittings and so on.

However, because generally these perfluoro polymers are insoluble, thesepolymers are being used in various applications in the method ofso-called hot melt molding.

In order to give the characteristics of this fluorine resin to variousbase materials, attempts were made to dissolve the amorphous fluorineresin in a solvent. For example, it has been proposed that the amorphoustetrafluoroethylene copolymer is dissolved and dispersed in themonoalkoxy-substituted solvent of the perfluoroalkane and so on, to bethe composition of the coatings. Moreover, it has been proposed that theamorphous fluorine-containing resin that has the fluorine-containingaliphatic cyclic structure in the main chain is dissolved in a specificperfluoro solvent, for example, perfluoro (2-butyl tetrahydrofuran); andthen the thin films of the fluorine-containing polymer free frompinholes can be formed from the perfluoro solvent solution of thisfluorine-containing polymer. (Patent document 1, Patent document 2, andPatent document 3).

However, the fluorine-containing solvents of perfluoroalkane,hydrofluorocarbon, hydrofluoroether, and so on that are used in theprior art have high global warming potential, and cannot satisfy therequirements from the perspective of the efforts to protect the globalenvironment (refer to Table 1 mentioned below).

DOCUMENTS OF PRIOR ART [Patent Document]

[Patent document 1] Patent Application Publication No. 2000-355677

[Patent document 2] Published Examined Patent Application No. 8-22929

[Patent document 3] Patent Publication No. 3,968,899

[Patent document 4] U.S. Patent Publication No. 2011/0282104

SUMMARY OF THE INVENTION

[The Problems to be Solved by this Invention]

Therefore, in order to solve the above mentioned problems, as a resultof the extensive studies, the inventors of this invention had found outthe amorphous fluorine-containing resin composition that has superiorfilm-forming ability, and has a small impact on the global environmentbecause it has very small global warming potential, and can fullysatisfy the requirement from the perspective of the environmentalprotection of the earth; and thus this invention was achieved.

That is to say, this invention provides an amorphous fluorine-containingresin composition that has superior film-forming ability, and has asmall impact on the global environment.

[Means to Solve the Problems]

The inventors of this invention had found out that by using alkoxyfluoroalkene as the solvent, the amorphous fluorine-containing resincomposition that has improved film-forming ability, and has a smallimpact on the global environment owing to its very small global warmingpotential, and can fully satisfy the requirement from the perspective ofthe environmental protection of the earth could be obtained; and thusthis invention was achieved.

That is to say, this invention provides an amorphous fluorine-containingresin composition that dissolves the amorphous fluorine-containing resinin alkoxy fluoroalkene.

The preferable embodiment of this invention is the above mentionedamorphous fluorine resin composition having the heat of fusion of theabove mentioned amorphous fluorine-containing resin of less than 3 J/gwhen measured at a heating rate of 10° C./min by a differential scanningcalorimetry (DSC).

This invention further provides the method to form the thin films of theamorphous fluorine-containing resin on the base materials by applyingthe above mentioned amorphous fluorine resin composition on the basematerials, followed by drying.

Moreover, this invention provides an article that contains a coatingthat is formed from the thin films that are made from the abovementioned amorphous fluorine resin composition.

[Effect of the Invention]

Through the amorphous fluorine-containing resin composition and themanufacturing method of that thin film, it is possible to obtain thearticle that is coated by the amorphous fluorine-containing resinwherein the thin films of the amorphous fluorine-containing resin isformed on the surface of the article without giving any adverse impactto the global warming, the used solvent is removed immediately from thesurface of the thin films, causing no damage to the surface of thecovered article by hot air, and so on.

Through this invention, the amorphous fluorine-containing resincomposition that dissolves the amorphous fluorine-containing resin inalkoxy fluoroalkene is provided.

[Embodiments to Execute this Invention]

In accordance with this invention, the amorphous fluorine-containingresin composition that dissolves the amorphous fluorine-containing resinin alkoxy fluoro alkene and the manufacturing method of that thin filmare provided.

[Solvent of this Invention]

In the amorphous fluorine-containing resin composition of thisinvention, alkoxy fluoroalkene is fluoroolefin that has an alkoxy groupand a double bond.

The alkoxyl group is preferably the alkoxyl group with 1-5 carbon atoms,and is more preferably the methoxy group or the ethoxy group with 1 or 2carbon atoms.

It is desirable for the carbon number of fluoroalkene to be 2-10, with5-8 being more preferable.

The preferable embodiment of this invention is the amorphousfluorine-containing resin composition wherein ethoxy fluoroalkene ormethoxy fluoroalkene having the carbon number of the fluoroalkene of2-10, preferably 5-8 is used as the solvent.

For the preferable example of alkoxy fluoroalkene, alkoxyperfluoroalkene can be mentioned. The perfluorinated alkene refers tothe compound wherein hydrocarbon that has 1 double bond, all thehydrogen atoms are substituted by fluorine.

For the alkoxy perfluoroalkene of this invention, the carbon number ofperfluoroalkene is preferably 2-10, and the carbon number is morepreferably 5-8.

For the preferable examples of alkoxy perfluoroalkene, methoxyperfluoroalkene of methoxy perfluoropentene, methoxy perfluorohexane,methoxy perfluoroheptene, methoxy perfluorooctene, and so on; and ethoxyperfluoroalkene of ethoxy perfluoropentene, ethoxy perfluorohexane,ethoxy perfluoroheptene, ethoxy perfluorooctene, and so on may bementioned as the examples.

Although there are multiple structural isomers in the alkoxyperfluoroalkene, there are no particular limitation on the structure,the mixture of those isomers can also be accepted, and it is possible toappropriately select the structure that is suitable for the purposes ofthis invention. For example, for the structure of methoxyperfluoroheptene, although the following examples are mentioned, anystructure can be accepted, and the mixture of these isomers can also beaccepted. In the case when selecting from the structural isomers ofalkoxy perfluoroalkene, it is desirable to select the material that ismore nonflammable.

-   -   (1) CF₃(CF₂)₂CF═CFCF(OCH₃)CF₃    -   (2) CF₃CF₂CF═CF(CF₃)₃(OCH₂)CF₃    -   (3) CF₃CF₂CF═CFCF(OCH₃)CF₂CF₃    -   (4) CF₃CF═CFCF(OCH₃)(CF₂)₂CF₃    -   (5) CF₃CF═CFCF₂CF(OCH₃)CF₂CF₃    -   (6) CF₃CF₂CF═C(OCH₃)(CF₂)₂CF₃    -   (7) CF₃CF₂C(OCH₃)═CFCF₂CF₂CF₃

The preferable embodiment of this invention is the amorphousfluorine-containing resin composition wherein alkoxy perfluoroalkene ormethoxy perfluoroalkene of which the carbon number of theperfluoroalkene is 2-10, preferably 5-8 is used as the solvent. In thesecompositions, the amorphous fluorine-containing resin compositionwherein the methoxy perfluoroheptene is used as the solvent is morepreferable.

Moreover, the amorphous fluorine-containing resin composition may beused alone, and may also be used as a mixture. In addition, because whenmanufacturing the thin films for the surface of the article, theworkability is improved by performing the work at a high temperaturewithin the range that does not damage the surface of the coveredarticle, it is preferable to select alkene with higher boiling pointfrom alkoxy fluoroalkenes of this invention.

[Manufacturing Method of Alkoxy Perfluoroalkene]

In this invention, for the manufacturing method of the alkoxyfluoroalkene that is used as the solvent for the amorphousfluorine-containing resin composition, the alkoxy perfluoroalkene thatis the preferred example is introduced below as a representativeexample. The manufacturing method is not limited to these examples.

The alkoxy perfluoroalkene can be obtained by distilling the productthat is generated from the reaction for about 2 hours, wherein in theperfluoroalkene that can be manufactured by the following method, in thepresence of the strong base such as KOH and so on, alcohol and a smallamount of water is added to conduct an exothermal reaction. To be morespecific, through the method that was described in Patent Document 4, byselecting perfluoroalkene as the appropriate reactant and alcohol toconduct the reaction, various types of alkoxy perfluoroalkenes, that isto say, methoxy perfluoropentene, methoxy perfluorohexane, methoxyperfluoroheptene, or methoxy perfluorooctene, and ethoxyperfluoropentene, ethoxy perfluorohexane, ethoxy perfluoroheptene orethoxy perfluorooctene and so on can be manufactured.

[Optional Components]

In the amorphous fluorine-containing resin composition of thisinvention, corresponding to the necessity within the range of notimpairing the purpose of this invention, the following components inaddition to alkoxy fluoroalkene such as the solvents, the stabilizers,and so on can be added.

As the solvent in addition to alkoxy fluoroalkene, at least more thanone type of solvent selected from, for example, hydrocarbons, alcohols,ketones, ethers, esters, and so on can be used alone or in combination.If these mixtures form an azeotropic composition, because the mixturecan be removed together with the solvent of this invention, it is morepreferable.

In the case when the solvent in addition to alkoxy fluoroalkene isflammable, because when mixing a large amount of the solvents, the wholecomposition will become flammable, it is preferable to use within therange that considered the flammability.

For the stabilizer, at least one type selected from nitroalkanes, suchas nitromethane, etc., epoxides such as propylene oxide, etc., furans,benzotriazoles, phenols, amines, and so on can be mentioned as examples.

[The Amorphous Fluorine-Containing Resin]

The amorphous fluorine-containing resin in this invention is the resinwherein any heat of fusion of the resin that is detected out by adifferential scanning calorimetry (DSC) is less than 3 J/g; only weakheat-absorption is detected even during the heating at the beginning,but no heat-absorption can be observed during the second time of DSCheating.

In the amorphous fluorine-containing resin composition of thisinvention, for the amorphous fluorine-containing resin, the copolymerthat at least contains tetrafluoroethylene (TFE) and is composed ofother comonomers that contains fluorine is preferable. In thatcopolymer, the amount of other fluorine-containing comonomers that arecontained is the amount that gives the amorphous nature to thefluorine-containing resin.

In addition, it is also possible to select from what is known as theamorphous fluorine-containing resins or the perfluoro elastomers thatare available on the market for use.

For the examples of the amorphous fluorine-containing resin of thisinvention, the copolymer of 1-70 wt % tetrafluoroethylene and 99-30 wt %perfluoro (alkyl vinyl ether), the copolymer oftetrafluoroethylene/perfluoro(butyl vinyl ether), the copolymer oftetrafluoroethylene/perfluoro dimethyl dioxole, the copolymer oftetrafluoroethylene/CF₂═CFOCF₂CF(CF₃)OCF₂CF₂SO₂F, and so on may bementioned as the examples. For the preferable amorphousfluorine-containing resin of these resins, the copolymer of 1-70 wt %tetrafluoroethylene and 99-30 wt % perfluoro (alkyl vinyl ether) may bementioned as the example.

For the resin that can be used as the amorphous fluorine-containingresin of this invention, the following examples described can bementioned as concrete examples, but this invention is not limited theseexamples. From these examples, one type or more than two types that aresuitable for the purpose of this invention can be appropriately selectedfor use.

(a) The copolymer (the TFE/PEVE copolymer) of 1-70 wt %tetrafluoroethylene and 99-30 wt % perfluoro (alkyl vinyl ether)

(b) Teflon (registered trademark) AF 1600 [product name, manufactured byDuPont Company, the copolymer of tetrafluoroethylene/perfluoro dimethyldioxole, Tg=160° C.]

(c) Teflon (registered trademark) AF 2400 [product name, manufactured byDuPont Company, the copolymer of tetrafluoroethylene/perfluoro dimethyldioxole, Tg=240° C.]

(d) Teflon (registered trademark) SF-60 [product name, manufactured byDuPont Company, the copolymer of tetrafluoroethylene/perfluoro methylvinyl ether/perfluoro ethyl vinyl ether]

(e) Teflon (registered trademark) SF-50 [product name, manufactured byDuPont Company, the copolymer oftetrafluoroethylene/hexafluoropropylene]

(f) Cytop [product name, manufactured by Asahi Glass Company, thecopolymer of tetrafluoroethylene /perfluoro (butenyl vinyl ether)]

(g) The sulfonyl fluorides of Nafion (registered trademark)[manufactured by DuPont Company, the copolymer of tetrafluoroethylene/CF₂═CFO CF₂ CF (CF₃) OCF₂ CF₂ SO₂ F]

(h) Hyflon AD [product name, manufactured by Solvay Company, thecopolymer of tetrafluoroethylene /perfluoro dimethyl dioxole]

[Preparation of the Amorphous Fluorine-Containing Resin Composition]

In the amorphous fluorine-containing resin composition that is obtainedby dissolving the amorphous fluorine-containing resin in alkoxyfluoroalkene, the concentration of the amorphous fluorine-containingresin is preferably in the range of 0.01-10 wt %, and more preferably0.5-5 wt %.

For the method of dissolving the amorphous fluorine-containing resin inalkoxy fluoroalkene, there is no particular limitation, theconventionally known methods can be adopted. At the time of dissolvingthe amorphous fluorine-containing resin in alkoxy fluoroalkene, it ispossible to promote the dissolution if an ultrasonic treatment isperformed.

For the amorphous fluorine-containing resin composition of thisinvention, it is also possible to mix and dissolve more than two typesof amorphous fluorine-containing resins in accordance with the purposeof that use. The mixing ratio of the amorphous fluorine polymer is inthe range of 0.1-99.9% of the total weight of the resin for onecomponent, and 99.9-0.1% for the sum of other components.

[Method to Form Thin Films that Used the Liquid Composition of theFluorine-Containing Polymer of this Invention]

Through drying after applying the amorphous fluorine-containing resincomposition of this invention on the base materials, it is possible toform the thin films of the amorphous fluorine-containing resin on thebase materials.

For the method of applying the amorphous fluorine-containing resincomposition on the base materials, there is no particular limitation,the conventionally known methods can be adopted. For example, it ispossible to use other dip methods, casting methods, roll coatingmethods, spin coating methods and so on in addition to the normalbrushing and spraying methods. Through drying after applying, it ispossible to form the thin films of the amorphous fluorine-containingresin on the base materials.

The obtained thin films can be used while the films are closely adheredon the base materials or are peeled from the base materials. Thethickness of the thin films can be in the range of 1-30 μm by adjustingthe concentration and the like of the dissolved amorphousfluorine-containing resin.

For the use of the obtained thin films, the pellicle films and so on inthe manufacturing process of semiconductors, the protective films inelectrical and electronic parts, optical parts, precision machineryparts, automotive parts and so on can be mentioned as the examples. Forthe base materials for the purpose of obtaining the thin films throughpeeling from the base materials, the flat plate-like shapes that aremade from metals, resins and so on are preferable, but this invention isnot limited those examples.

In the case when the thin films are used while the films are closelyadhered on the base materials, as the subject of the base materials,wiring boards such as printed circuit boards, ceramic wiring board,etc.; optical fibers, solar cells, touch panel, film capacitors, liquidcrystal, plasma display and other display components can be mentioned asexamples.

As optical components, lenses that are used in glasses, cameras, andhousings of the lenses can be mentioned as examples.

EMBODIMENTS

In the following paragraphs, the embodiments are given to furtherexplain this invention in detail, but this invention is not limited tothese embodiments.

The test of the physical properties in this invention was carried out bythe following methods.

(1) Solubility

19.8 g fluorine-containing solvent and 0.2 g fluorine-containing resinwere placed in the sample tube (50 mL), by an ultrasonic treatment overa period of about 180 minutes at 50° C., based on the combined weight ofthe resin and the solvent, 1 wt % composition was created. After thetreatment, the composition was left standing for 10 minutes at 50° C.,and then the state of the obtained composition was visually observed.

The state in the sample tube after the ultrasonic treatment wasevaluated in accordance with the following criteria.

Soluble: cloudiness and precipitation cannot be observed

Insoluble: cloudiness and precipitation at the bottom can be observed

(2) Film-Forming Ability

On one side of the glass plate in the size of 76 mm×26 mm, 2 mL solutionof the fluorine-containing resin was applied, after any excess solutionwas removed by tilting the glass plate at 90°, the plate was dried for 3hours at 60° C., and then the state of the obtained coating film wasvisually observed.

The state of the coating film after drying was evaluated in accordancewith the following criteria.

∘: it was a good coating film

X: unevenness was observed

The Table 1 shows the global warming potential and the boiling point ofthe fluorinated solvent that is conventionally used and the amorphousfluorine-containing resin composition of this invention. The value ofthe conventional fluorinated solvent was transcribed from the reportthat was published, while the value of the solvent of this invention wasthe value calculated by the applicant for methoxy perfluoroheptane,which is described in the following Embodiment 1. In addition, the(Global Warming Potential GWP) is based on the carbon dioxide, andrefers to a number that indicates how much potential of global warmingother greenhouse gas has; and GWP is an estimated value of the ratio ofthe integrated value (that is to say, the impact on global warming) ofthe radiation energy that is applied to the earth in a given period oftime to O₂ at the time when the greenhouse gas in the unit mass isreleased into the atmosphere.

TABLE 1 Global Warming Potential Fluorine-containing solvent GlobalWarming Potential Boiling point Methoxy perfluoroheptene <10 (Note 2)110° C. 1,1,1,2,3,4,5,5,5- 1,640 (Note 1) 55° C. decafluoropentaneMethoxy perfluorohexane 200 (Note 3) 98° C. F(CF₂)₆OCH₃ (Note 1) 2007Fourth Assessment Report from the Intergovernmental Panel on ClimateChange (Abbreviated: IPCC) (Note 2) Calculated by the applicant (Note 3)From Table 2 of Patent Application Publication No. 2010-164043

Preparation Example 1 Preparation of the TFE/PEVE Copolymer (the Contentof PEVE is 56 wt %)

In a one gallon (3.8 L) reactor, 2400 mL deionized water, thesurfactant, and the polymerization initiator was used, 323 g PEVE wassupplied, by the reaction with TFE, the dispersion solution of which thecontent of solid materials was 5 wt % was obtained. The generatedcopolymer was washed clean using the deionized water, and then dried for1.5 hours at 150° C. The composition of the generated copolymer that wasmeasured by 19 F-nuclear magnetic resonance (NMR) spectrum analysis wasTFE/PEVE =44/56 by weight. The melting point of this TFE/PEVE copolymerwas not detected by DSC, and the glass transition temperature was 20° C.

Embodiment 1

19.8 g methoxy perfluoroheptene, 0.2 g TFE/PEVE copolymer (the contentof PEVE was 56 wt %) as the fluorine-containing polymer were placed inthe sample tube (50 mL), by an ultrasonic treatment over a period ofabout 180 minutes at 50° C., based on the combined weight of the resinand the solvent, 1 wt % composition was created. The film-manufacturingability of the obtained composition was tested. The results are shown inTable 2. It is understood that the fluorine-containing polymer wasdissolved to form the solution.

The methoxy perfluoroheptene that was used was the mixture of theisomers, the constitution of the mixture of the isomers shown inparagraph [0016] was 49% isomer (3), 20% (4), 20% (7), 6% (6), and theremaining percentage for other isomers.

Embodiment 2

Teflon (registered trademark) AF 1600 as the fluorine-containing polymerwas used, and the same procedures as Embodiment 1 were conducted. Theresults are shown in Table 2.

Embodiment 3

Teflon (registered trademark) AF 2400 as the fluorine-containing polymerwas used, and the same procedures as in Embodiment 1 were conducted. Theresults are shown in Table 2.

Embodiment 4

19.8 g methoxy perfluoroheptene that was used in Embodiment 1, 0.1 gTFE/PEVE copolymer (the content of PEVE is 56 wt %) as thefluorine-containing polymer, and 0.1 g Teflon (registered trademark) AF1600 were placed in the sample tube (50 mL), by the ultrasonic treatmentover a period of about 180 minutes at 50° C., based on the combinedweight of the resin and the solvent, 1 wt % composition was created. Thefilm-forming ability of the obtained composition was tested. The resultsare shown in Table 2. It is understood that the fluorine-containingpolymer was dissolved to form the solution.

Embodiment 5

The TFE/PEVE copolymer as fluorine-containing polymer (the content ofPEVE is 56 wt %) as the fluorine-containing polymer and Teflon(registered trademark) AF 2400 were used, and the same procedures asEmbodiment 4 were conducted. The results are shown in Table 2.

Comparative Example 1

1,1,1,2,3,4,5,5,5-Decafluoropentane as the solvent (manufactured byDupont-Mitsui Fluorochemicals Co., Ltd., Vertrel (registered trademark)XF) was used, and the same procedures as Embodiment 1 were conducted.The results are shown in Table 2.

Comparative Example 2

1,1,1,2,3,4,5,5,5-Decafluoropentane as the solvent (manufactured byDupont-Mitsui Fluorochemicals Co., Ltd., Vertrel (registered trademark)XF) was used, and the same procedures as Embodiment 2 were conducted.The results are shown in Table 2.

Comparative Example 3

Nonafluorobutyl methyl ether as the solvent (manufactured by 3M Company,Novec (registered trademark) HFE-7100) was used, and the same proceduresas Embodiment 2 were conducted. The results are shown in Table 2.

TABLE 2 comparison of the solubility of the amorphousfluorine-containing resin composition Solvent Polymer SolubilityEmbodiment 1 Methoxy TFE/PEVE Soluble perfluoroheptene Embodiment 2Methoxy Teflon AF 1600 Soluble perfluoroheptene Embodiment 3 MethoxyTeflon AF 2400 Soluble perfluoroheptene Embodiment 4 Methoxy TFE/PEVE,and Soluble perfluoroheptene Teflon AF 1600 Embodiment 5 MethoxyTFE/PEVE, and Soluble perfluoroheptene Teflon AF 2400 Comparative1,1,1,2,2,3,4,5,5,5- TFE/PEVE Insoluble Example 1 decafluoropentaneComparative 1,1,1,2,2,3,4,5,5,5- Teflon AF 1600 Insoluble Example 2decafluoropentane Comparative Nonafluorobutyl Teflon AF 1600 InsolubleExample 3 methyl ether

Embodiment 6-10 Test of the Film-Forming Ability

It is possible to form the uniform thin film without any pinholes by themethod wherein the composition that was obtained in accordance withEmbodiment 1-5 was applied on the glass plate, and then dried for 3hours at 60° C. The state of the obtained coating film was visuallyobserved. The results are shown in Table 3.

The state of the coating film after drying was evaluated in accordancewith the following standard.

∘: it was a good coating film

X: unevenness was observed

Embodiment 11

19.0 g methoxy perfluoroheptene and 1.0 g Teflon (registered trademark)AF 2400 as the fluorine-containing polymer were placed in the sampletube (50 mL), by the ultrasonic treatment over a period of about 180minutes at 50° C., based on the combined weight of the resin and thesolvent, 5 wt % solution was created. This solution was applied on theglass plate, and then dried for 3 hours at 100° C. The state of theobtained coating film was visually observed. The results are shown inTable 3.

Comparative Example 6-8

The dispersion solution that was obtained in accordance with ComparativeExample 1-3 was applied on the glass plate, and then dried for 3 hoursat 60° C. to form the thin films. The pinholes were observed in theobtained coating film. The results are shown in Table 3.

TABLE 3 comparison of the film-forming ability of the amorphousfluorine-containing resin composition Film Film- thick- forming nessSolvent Polymer ability (μm) Embodiment 6 Methoxy TFE/PEVE ◯ 2.0perfluoroheptene Embodiment 7 Methoxy Teflon ◯ 5.0 perfluoroheptene AF1600 Embodiment 8 Methoxy Teflon ◯ 5.0 perfluoroheptene AF 2400Embodiment 9 Methoxy TFE/PEVE, ◯ 3.5 perfluoroheptene Teflon AF 1600Embodiment 10 Methoxy TFE/PEVE, ◯ 3.0 perfluoroheptene Teflon AF 2400Embodiment 11 Methoxy Teflon ◯ 30.0 perfluoroheptene AF 2400 Comparative1,1,1,2,2,3,4,5,5,5- TFE/PEVE X — Example 4 decafluoropentaneComparative 1,1,1,2,2,3,4,5,5,5- Teflon X — Example 5 decafluoropentaneAF 1600 Comparative Nonafluorobutyl Teflon X — Example 6 methyl ether AF1600

[Applicability in the Industry]

In accordance with this invention, the amorphous fluorine-containingresin composition that has superior film-forming ability and has a smallimpact on the global environment is provided.

In accordance with this invention, the amorphous fluorine-containingresin composition and the manufacturing method of that thin film areprovided, wherein it is possible to form the thin films of the amorphousfluorine-containing resin in a way that the thin films of the amorphousfluorine-containing resin is formed on the surface of the articlewithout giving any adverse impact to the global warming, the usedsolvent is removed immediately from the surface of the thin films, andno damage is caused to the surface of the covered article by the hotair, and so on.

By the method of using the amorphous fluorine-containing resincomposition of this invention to form the thin films, which will have noadverse impact on the global warming, it is possible to utilize variouscharacteristics of the amorphous fluorine-containing resin compositionto form the thin films quickly on the surface of the target article.

In accordance with this invention, the amorphous fluorine-containingresin composition that dissolves the amorphous fluorine-containing resinin alkoxy fluoroalkene is provided.

1. An amorphous fluorine-containing resin composition comprisingamorphous fluorine-containing resin dissolved in alkoxy perfluoroalkene,wherein the number of carbon atoms in the perfluoroalkene group of saidalkoxy perfluoroalkene is from 5-8, and wherein said amorphousfluorine-containing resin is at least one resin selected from the groupconsisting of copolymer of tetrafluoroethylene and perfluoro(dimethyldioxole), and copolymer of tetrafluoroethylene and perfluoro(butenylvinyl ether).
 2. (canceled)
 3. (canceled)
 4. The amorphousfluorine-containing resin composition as described in claim 1, whereinsaid alkoxy perfluoroalkene is methoxy perfluoroalkene.
 5. The amorphousfluorine-containing resin composition as described in claim 4, whereinmethoxy perfluoroalkene is methoxy perfluoroheptene.
 6. The amorphousfluorine resin composition as described in claim 1, wherein the heat offusion of the amorphous fluorine-containing resin is less than 3 J/gwhen measured at a heating rate of 10° C./min by a differential scanningcalorimetry.
 7. (canceled)
 8. The amorphous fluorine-containing resincomposition as described in claim 1, wherein the amorphousfluorine-containing resin is 0.01-10 wt % of the composition.
 9. Amethod of forming a thin films of amorphous fluorine-containing resin ona base material, comprising applying to said base material an amorphousfluorine-containing resin composition of claim 1 and drying the coatedbased material, thereby forming a thin film of said amorphousfluorine-containing resin on said base material.
 10. An article thatcontains a coating that is formed from the composition as described inclaim 1.